Charles habold nicholson



No. 748,642 PATENTED JAN. 5, 1904.

' G. H. NICHQLEiON.

JAR CLOSURE. APPLICATION IILBI? APR. 6, 1903.

No Menu.

l/vnmu M w H A TTORNE YS m zww UNITED STATES Patntediamraryfi, 1904 PAT NT. OFFICE. 1

JAR-CLOSURE.

. srncrrxcsrlon To all whom itmosy concern:

Be it knowuthat 1, CHARLES HAROLD N103- OLsON,a citizen of theUnited Stat es ,and a resident of the city of New York, borough of Man hattan, in the county and State of New York,

have invented a new and Improved Jar-Clo sure, of which the following is a full, clear, and exact description.

The object of the invention is to provide a?"- new and improved jar-closure which is simple and durable 'in construction, cheap to manufacture, and arranged to hermetically seal the jar and preserve the contents thereof against deterioration.

The invention conslstsof novel features and partsand combinations of the same, as will be more fully described hereinafter and then pointed out in the claims. l

A practical embodiment of the invention is represented in the accom panyi-ngdrawings, forming a part of this specification, in which similar characters of reference indicate corresponding-parts in all the views.

Figure 1 is a sectional side elevation of the improvement, showing the closure and-jar separated. Fig. 2 is a sectional side elevation of the same, showing the closure in position on the. jar previous to a final closing position. Fig. 3 is a likeview of the same,; showing the jar hermetically sealed. Fig. 4 isa perspective view of the locking-clamp,

and Fig. 5 is an enlarged sectional side elevation of the improvement.

The jar A, to be closed bya cover B, is provided at the exterior of its mouth A with an approximately horizontally disposed annular shoulder A formed in itssurface with an, annular groove A, spaced a distance from the sides of the shoulder, and on the latter is placed a packing-ring C, of rubber or other suitable flexible material, and engaged at the top directly above 7 the groove A by the V-' shaped bottom edge of the annular rim B of the cover B to press the middle portion of-the packing-ring G into the groove and in contact with the bottom thereof at the time the cover is moved into a final closed position, as will be readily understood by reference to Fig. 3.

, By the arrangement described a hermetic formingart of Letters Patent No. 748,642, dated January rs, 1904. Application filed April 6', 1203; Serial no. 151,305. .No model.)

sealing of the jar by the cover is obtaihed, as

the packing-ring prevent the formation of the most minute'airpassage to the interior of the jar by way er the joint between the jar and cover.

From the foregoing it will be seen that a lar contact of the cover'with the packing-ring and shoulder, but three independent seals are formed, one in the groove and the others on the sides of the shoulder adjacent to the groove, and the lI-shaped bottom of 'the cover B hastwo surfaces in engagement with the top ofthe packing-ring.

Now defects may occur in all of the edges y can readily conform itoa, y unevenness on the shoulder A and' heh'ce" "perfect seal is not relied on by but one annus and surfaces formed at the joint, and still a hermetic seal will not be prevented,especi ally as each of the annular joints of contact forms a dlosure independent of the others. Hence unless all the defects occur in exactly the same part of ,the circumference of both the jar andcoverto be directly over each other,

and this is-practically impossible, a tight seal must result in every instance, and-consequently glassware useless for other purposes maybe called perfect when this closure is used. This absolute certainty of a seal always resulting means an immense saving not only to the glass manufacturer, but to the packer of the goods in the jar, as a defect will sometimes be so slight that weeks oreven months elapse before sufficient air is admitted to the interior of the jar to spoil the contents, and consequently such defect cannot be detected when the goods are put up by the manufacturer.

The cover B is provided with a locking device, such as a U-shaped spring-clamp D, extending with its middle portion D diametrically over the top of the cover B and having its sides D formed with inwardly-extending lugs D adapted to engage retainers in the form of annular shoulders A A formed exteriorly on the mouth A of the jar one above the otheryas plainly indicated in the drawings. Now when the jar is filled with goods liable to spoil and air gains access to the contents or the jar it is desirable to form a vacu- 4 exhausted from the jar by a vacuum-pump.

-2, and then a slight rap with a hammer or 'clamp is engaged with the shoulder A so that co e side of the V-shaped bottom of the. rim B of the cover is firmly in engagement with the packing-ring and presses the same down-in its groove, while-the opposite sideof the \I-shaped rim-bottom rests'but loosely on the packing-ring, and hence forms an escape for the air and gases rising within the jar during the heating process or when the air is When the heating is completed and the jar is allowed to cool,then the vacuum formed within the .jar causes a final closing of the cover 13 by atmospheric pressn re on the outside of the cover B, so that the latter-moves into the position shown in Fig. 3, and the clamp D may be entirely removed,'if desired. As a rule, however, the end of the clamp having the lug D engaging the shoulder A is pressed down, so that the lug D engages the shoulder A, the same as the otherlug, to securely lock the cover 0 against accidental opening.

When the jar is used for jams, pickles, or other products which do not require a vacuum to prevent fermentation, then the cover is placed first in the position shown in Fig.

the like on the end of the clamp engaging the shoulder A causes this end to move downward to engage the shoulder A, as indicated in Fig. 3. Thus the jar can be very quickly closed, and by the particular construction of the joint between the cover and the jars. hermetic sealing of the jar is obtained.

When it is'desired to open the jar, an airpassage can easily be formed through the exposed rubber' ring by inserting any sharp instru ment under the outer beveled edge of the V-shaped rim of the cover.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent- 1. A jar having a cover provided with looking means for engaging the jar, to hold the cover in a locked position when partly closed and when fully closed, as set forth.

2. A jar-closure comprising a jar having a plurality of retainers,'anda cover for the jar, having locking means for engaging the retainers to hold the cover in position when partly closed, as set forth. h

3. A jar-closure comprising a jar havinga plurality of retainers, and a cover for the jar, having locking means for engaging the retainers, to hold the cover in position when partly closed and when finally closed, as set forth.

4. Ajar-closure comprising a jar having a plurality of annular retainers, one above the other, and acover for the jar, having a spring locking-clamp for engaging the retainers, to hold the cover in position when partly closed and when finally closed, as set forth.

5. In a jar-closure, the combination of a jar having a plurality of annular retainers and an annular shoulder formedwith an annulargroove spaced from the sides of the said shoulder, with a flexible annular packingring on the said shoulder, a cover having a flange provided with a V-shaped bottom for engaging the packing-ring over thejsaid groove, to press the middle portion of the packing-ring into the groove, and a springclamp engaging the said cover and, adapted to engage the annular retainers on the jar, the retainers being located one above the other, as set forth. In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

I CHARLES H ROLD NICHOLSON.

Witnesses:

THEO. G. HOSTER, EVERARD BOLTON MARSHALL. 

